﻿Shader "Custom/HeightGradualWorldSpace"
{
    Properties {
        _Color ("Color", Color) = (1,1,1,1)
        _MainTex ("Albedo (RGB)", 2D) = "white" {}
        _Glossiness ("Smoothness", Range(0,1)) = 0.5
        _Metallic ("Metallic", Range(0,1)) = 0.0
        _ButtonY ("ButtonY", Range(-10,10)) = 0.0
        _GradualScale("GradualScale",Range(0.1,10)) =1.0
    }
    SubShader {
        Tags { "RenderType"="Opaque" }
        LOD 200
        
        CGPROGRAM
        // Physically based Standard lighting model, and enable shadows on all light types
        #pragma surface surf Standard fullforwardshadows

// Use shader model 3.0 target, to get nicer looking lighting
        #pragma target 3.0

sampler2D _MainTex;

struct Input {
            float2 uv_MainTex;
            float3 worldPos;
        };

half _Glossiness;
        half _Metallic;
        fixed4 _Color;
        float _ButtonY;
        float _GradualScale;
     
        void surf (Input IN, inout SurfaceOutputStandard o) {
            // Albedo comes from a texture tinted by color
            fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
            o.Albedo = c.rgb*(IN.worldPos.y*_GradualScale-_ButtonY);
            // Metallic and smoothness come from slider variables
            o.Metallic = _Metallic;
            o.Smoothness = _Glossiness;
            o.Alpha = c.a;
        }
        ENDCG
    } 
    FallBack "Diffuse"
}
